"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : DMS分布式锁
Case Name   : 集群中备机select表，主机drop表，存在锁冲突，提交备节点事务
Create At   : 2023/4/21
Owner       : opentestcase033
Description :
    1.创建测试表
    2.备节点开启事务A，查询表，不提交，等事务B执行后提交
    3.主节点开启事务B，删除表
    4.清理环境
Expect:
    1.成功
    2.执行成功，获取锁
    3.执行阻塞，事务A提交后，事务B删除表成功
    4.成功
History     :
"""

import os
import time
import unittest

from testcase.utils.Logger import Logger
from testcase.utils.Common import Common
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.ComThread import ComThread


class DmsOck(unittest.TestCase):

    def setUp(self):
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.std_sh = CommonSH('Standby1DbUser')
        self.constant = Constant()
        self.table = 't_dms_ock_0023'

    def test_dms_ock(self):
        text1 = '-----step1:创建测试表;expect:成功-----'
        self.log.info(text1)
        create_tb = f"drop table if exists {self.table};" \
                    f"create table {self.table}(" \
                    f"id int, name varchar, source number) " \
                    f"with (segment = on);" \
                    f"insert into {self.table} values" \
                    f"(1,'haha',92),(2,'tutu',85);"
        create_res = self.pri_sh.execut_db_sql(create_tb)
        self.log.info(create_res)
        self.assertIn(self.constant.CREATE_TABLE_SUCCESS, create_res,
                      f"执行失败:{text1}")
        self.assertIn(self.constant.INSERT_SUCCESS_MSG, create_res,
                      f"insert失败:{text1}")

        text2 = '-----step2:备节点开启事务A，查询表，事务b执行后提交A;' \
                'expect:执行成功，获取锁-----'
        self.log.info(text2)
        sql1 = f"start transaction;" \
               f"select * from {self.table};" \
               f"select locktype,relname,mode from pg_locks,pg_class " \
               f"where relation = oid and relname = '{self.table}';" \
               f"select pg_sleep(3);" \
               f"commit;"
        session1 = ComThread(self.std_sh.execut_db_sql, args=(sql1,))
        session1.setDaemon(True)
        session1.start()
        time.sleep(1)

        text3 = '-----step3:主节点开启事务B，删除表;' \
                'expect:事务A提交(解锁)后，事务B删除表成功-----'
        self.log.info(text3)
        sql2 = f"start transaction;" \
               f"drop table {self.table};"
        session2 = ComThread(self.pri_sh.execut_db_sql, args=(sql2,))
        session2.setDaemon(True)
        session2.start()
        session1.join(10)
        session2.join(10)
        result1 = session1.get_result()
        self.log.info(f'session1_results: {result1}')
        result2 = session2.get_result()
        self.log.info(f'session2_results: {result2}')
        self.assertIn('1 | haha |     92', result1, f"执行失败{text2}")
        self.assertIn('2 | tutu |     85', result1, f"执行失败{text2}")
        self.assertIn(self.constant.COMMIT_SUCCESS_MSG, result1,
                      f"提交事务失败: {text2}")
        self.assertIn(self.constant.DROP_TABLE_SUCCESS, result2,
                      f"执行失败{text3}")

    def tearDown(self):
        text4 = '-----step4:清理环境 expect:成功-----'
        self.log.info(text4)
        drop_ts_res = self.pri_sh.execut_db_sql(
            f"drop table if exists {self.table} cascade;")
        self.log.info(drop_ts_res)
        self.assertIn(self.constant.DROP_TABLE_SUCCESS,
                      drop_ts_res, f"删表失败:{text4}")
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
